1 #include <sys/select.h>
2 #include <signal.h>
3 #include <stdint.h>
4 #include <errno.h>
5 #include "syscall.h"
6
7 #define IS32BIT(x) !((x)+0x80000000ULL>>32)
8 #define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
9
pselect(int n,fd_set * restrict rfds,fd_set * restrict wfds,fd_set * restrict efds,const struct timespec * restrict ts,const sigset_t * restrict mask)10 int pselect(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict efds, const struct timespec *restrict ts, const sigset_t *restrict mask)
11 {
12 syscall_arg_t data[2] = { (uintptr_t)mask, _NSIG/8 };
13 time_t s = ts ? ts->tv_sec : 0;
14 long ns = ts ? ts->tv_nsec : 0;
15 #ifdef SYS_pselect6_time64
16 int r = -ENOSYS;
17 if (SYS_pselect6 == SYS_pselect6_time64 || !IS32BIT(s))
18 r = __syscall_cp(SYS_pselect6_time64, n, rfds, wfds, efds,
19 ts ? ((long long[]){s, ns}) : 0, data);
20 if (SYS_pselect6 == SYS_pselect6_time64 || r!=-ENOSYS)
21 return __syscall_ret(r);
22 s = CLAMP(s);
23 #endif
24 return syscall_cp(SYS_pselect6, n, rfds, wfds, efds,
25 ts ? ((long[]){s, ns}) : 0, data);
26 }
27